BPHE-101

A ball having a mass of 0.5 kg is moving towards the east with a speed of 8.0 ms⁻¹. After being hit by a bat it changes its direction and starts moving towards the north with a speed of 6.0 ms⁻¹. If the time of impact is 0.1 s, calculate the impulse and average force acting on the ball.

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Introduction This problem involves a change in the direction of motion of a ball due to a hit by a bat. Since the direction changes from east to north, we must deal with vector quantities. The concepts of impulse and average force are used here, which are based on the impulse-momentum theorem. Given Data Mass […]

A ball having a mass of 0.5 kg is moving towards the east with a speed of 8.0 ms⁻¹. After being hit by a bat it changes its direction and starts moving towards the north with a speed of 6.0 ms⁻¹. If the time of impact is 0.1 s, calculate the impulse and average force acting on the ball. Read More »

A crate of mass 30.0 kg is pulled by a force of 300 N up an inclined plane which makes an angle of 30º with the horizon. The coefficient of kinetic friction between the plane and the crate is μk = 0.225. If the crate starts from rest, calculate its speed after it has been pulled 15.0 m. Draw the free body diagram.

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Introduction In this problem, we are asked to calculate the final speed of a crate being pulled up an inclined plane with friction. To solve this, we apply Newton’s laws of motion and the work-energy theorem. We’ll also include a descriptive explanation of the free body diagram (FBD). Given Data Mass of crate, m =

A crate of mass 30.0 kg is pulled by a force of 300 N up an inclined plane which makes an angle of 30º with the horizon. The coefficient of kinetic friction between the plane and the crate is μk = 0.225. If the crate starts from rest, calculate its speed after it has been pulled 15.0 m. Draw the free body diagram. Read More »

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